package com.mlh.entity;

import com.alibaba.fastjson.annotation.JSONField;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author 缪林辉
 * @date 2024/3/13 17:22
 * @DESCRIPTION
 */
@Data
@NoArgsConstructor
public class LoginUser implements UserDetails {

    private User user;
    //用于封装我们自己定义的权限信息
    private List<String> permissions;

    public LoginUser(User user, List<String> permissions) {
        this.user = user;
        this.permissions = permissions;
    }

    //存储SpringSecurity所需要的权限信息的集合
    @JSONField(serialize = false)//这个注解是说明该属性不用序列化，因为GrantedAuthority是不可序列化的
    private List<GrantedAuthority> authorities;

    // springSecurity框架是从这个方法的返回值中获取权限信息的
    // 因此我们需要将我们自己定义的权限信息集合和springSecurity框架所需的权限信息集合做一个耦合
    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        //这一步是提高效率，如果权限集合已经被转换过了，就不需要重复转换了
        if(authorities!=null){
            return authorities;
        }
        //把permissions中字符串类型的权限信息转换成GrantedAuthority对象存入authorities中
        authorities =
                permissions.stream()
                        .map(SimpleGrantedAuthority::new)
                        .collect(Collectors.toList());
        return authorities;
    }

    @Override
    public String getPassword() {
        return user.getPassword();
    }

    @Override
    public String getUsername() {
        return user.getUserName();
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        return true;
    }
}
